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Date: Tue, 2 Feb 2016 17:34:54 +0300
From: Vladimir Davydov <vdavydov@...tuozzo.com>
To: Johannes Weiner <hannes@...xchg.org>
CC: Andrew Morton <akpm@...ux-foundation.org>,
Michal Hocko <mhocko@...e.cz>, <linux-mm@...ck.org>,
<cgroups@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<kernel-team@...com>
Subject: Re: [PATCH v2 5/5] mm: workingset: per-cgroup cache thrash detection
On Fri, Jan 29, 2016 at 12:54:07PM -0500, Johannes Weiner wrote:
> Cache thrash detection (see a528910e12ec "mm: thrash detection-based
> file cache sizing" for details) currently only works on the system
> level, not inside cgroups. Worse, as the refaults are compared to the
> global number of active cache, cgroups might wrongfully get all their
> refaults activated when their pages are hotter than those of others.
>
> Move the refault machinery from the zone to the lruvec, and then tag
> eviction entries with the memcg ID. This makes the thrash detection
> work correctly inside cgroups.
>
> Signed-off-by: Johannes Weiner <hannes@...xchg.org>
Reviewed-by: Vladimir Davydov <vdavydov@...tuozzo.com>
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